Iowa inmate Shawn Shelton appeals the district court’s 1 orders, entered in his 42 U.S.C. § 1983 action, dismissing one claim on initial review, denying his motions to amend his complaint, and finally granting summary judgment to defendants. Having carefully reviewed the record de novo and considered Shelton’s arguments for reversal, we conclude that the district court properly dismissed Shelton’s retaliation claim and properly granted summary judgment for defendants, for the reasons explained in the court’s thorough orders. We conclude as well that the district court did not abuse its discretion in denying Shelton’s motions to amend his complaint, which sought to add claims and defendants not related to the original complaint, and did not cure the defects that resulted in dismissal. Accordingly, we affirm. See 8th Cir. R. 47B.